Is shuffle on Spotify really random?

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Tags

1. #shuffle
2. #still
3. #again
4. #reason
5. #never
6. #since
7. #version
8. #older
9. #their
10. #spotify
11. #already
12. #could
13. #updated
14. #because
15. #plays
16. #often
17. #random
18. #algorithm